Easy to use and convenient, functions include Metronome, Tuner* and Reference Tone Generator.*Additional function for tuning in just intonation: just a major third (M3), just a minor third (m3) indicator.Specifications:Tuner - Tuning Range: A0-C8 (when A4 is set to 440Hz)Reference Tone range: C4-B4 (12 notes)Pitch Shif6/8, Quaver, Triplet, Semi QuaverInpu6mm mono jack socketOutpuspeakerDimensions: 105w x 64h x 18d (mm)Weight: Approx 90g inc batteriesBatteries: 2 x AAA 3V